EP0024694A3 - Process for preparing ferromagnetic acicular iron particles, and their use - Google Patents

Process for preparing ferromagnetic acicular iron particles, and their use Download PDF

Info

Publication number
EP0024694A3
EP0024694A3 EP80104979A EP80104979A EP0024694A3 EP 0024694 A3 EP0024694 A3 EP 0024694A3 EP 80104979 A EP80104979 A EP 80104979A EP 80104979 A EP80104979 A EP 80104979A EP 0024694 A3 EP0024694 A3 EP 0024694A3
Authority
EP
European Patent Office
Prior art keywords
iron particles
acicular iron
preparing ferromagnetic
ferromagnetic acicular
preparing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80104979A
Other languages
German (de)
Other versions
EP0024694A2 (en
EP0024694B1 (en
Inventor
Werner Dr. Steck
Wilhelm Dr. Sarnecki
Laszlo Dr. Marosi
Manfred Dr. Ohlinger
Werner Dr. Loeser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP0024694A2 publication Critical patent/EP0024694A2/en
Publication of EP0024694A3 publication Critical patent/EP0024694A3/en
Application granted granted Critical
Publication of EP0024694B1 publication Critical patent/EP0024694B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/065—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder obtained by a reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/061—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder with a protective layer

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Paints Or Removers (AREA)
EP80104979A 1979-09-01 1980-08-21 Process for preparing ferromagnetic acicular iron particles, and their use Expired EP0024694B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792935358 DE2935358A1 (en) 1979-09-01 1979-09-01 METHOD FOR PRODUCING NEEDLE-SHAPED FERROMAGNETIC IRON PARTICLES AND THE USE THEREOF
DE2935358 1979-09-01

Publications (3)

Publication Number Publication Date
EP0024694A2 EP0024694A2 (en) 1981-03-11
EP0024694A3 true EP0024694A3 (en) 1981-08-26
EP0024694B1 EP0024694B1 (en) 1983-09-28

Family

ID=6079797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104979A Expired EP0024694B1 (en) 1979-09-01 1980-08-21 Process for preparing ferromagnetic acicular iron particles, and their use

Country Status (4)

Country Link
US (1) US4344791A (en)
EP (1) EP0024694B1 (en)
JP (1) JPS5638405A (en)
DE (2) DE2935358A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS596502A (en) * 1982-07-05 1984-01-13 Mitsui Toatsu Chem Inc Manufacture of improved ferromagnetic iron powder
DE3228669A1 (en) * 1982-07-31 1984-02-02 Basf Ag, 6700 Ludwigshafen METHOD FOR PRODUCING NEEDLE-SHAPED FERROMAGNETIC METAL PARTICLES, ESSENTIALLY IRON
JPS59157204A (en) * 1983-02-23 1984-09-06 Chisso Corp Manufacture of ferromagnetic metallic fine particle
US4464196A (en) * 1983-08-24 1984-08-07 Hercules Incorporated Acicular ferromagnetic metal particles
JP2582764B2 (en) * 1986-02-05 1997-02-19 バスフ アクチェン ゲゼルシャフト Method for producing acicular ferromagnetic metal powder consisting essentially of iron
US5069216A (en) 1986-07-03 1991-12-03 Advanced Magnetics Inc. Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract
US5219554A (en) 1986-07-03 1993-06-15 Advanced Magnetics, Inc. Hydrated biodegradable superparamagnetic metal oxides
JPH03194905A (en) * 1989-12-22 1991-08-26 Ishihara Sangyo Kaisha Ltd Manufacture of magnetic metal powder for magnetic recording
SE9401392D0 (en) * 1994-04-25 1994-04-25 Hoeganaes Ab Heat-treating or iron powders
US8911663B2 (en) * 2009-03-05 2014-12-16 Quebec Metal Powders, Ltd. Insulated iron-base powder for soft magnetic applications

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH528320A (en) * 1969-04-17 1972-09-30 Stamicarbon Discs, tapes and magnetic bodies for magnetic recordings
FR2368131A1 (en) * 1976-10-14 1978-05-12 Basf Ag PARTICLES

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204644B (en) * 1962-03-30 1965-11-11 Basf Ag Process for the production of acicular iron oxide yellow, alpha-OH, which is particularly suitable as a starting material for the production of highly coercive ª † iron (III) oxide
NL162233C (en) * 1968-03-05 1980-04-15 Philips Nv METHOD FOR PREPARING AN IRON MAGNETIC STABLE POWDER, FOR MAGNETIC REGISTRATION.
NL163355C (en) * 1969-04-08 1980-08-15 Philips Nv METHOD FOR PREPARING AN IRON MAGNETIC STABLE METAL POWDER, FOR MAGNETIC REGISTRATION.
DE2434058C2 (en) * 1974-07-16 1985-12-19 Basf Ag, 6700 Ludwigshafen Acicular ferromagnetic metal particles consisting primarily of iron and processes for their manufacture
DE2434096C2 (en) * 1974-07-16 1985-10-17 Basf Ag, 6700 Ludwigshafen Acicular ferromagnetic metal particles consisting primarily of iron and processes for their manufacture
DE2550225C3 (en) * 1975-11-08 1978-06-22 Basf Ag, 6700 Ludwigshafen Process for the production of acicular Y-iron (IID-oxide
DE2550307C3 (en) * 1975-11-08 1978-07-06 Basf Ag, 6700 Ludwigshafen Process for the production of acicular Y-iron (ni) oxide
DE2550308C3 (en) * 1975-11-08 1978-07-13 Basf Ag, 6700 Ludwigshafen Process for the production of acicular α-ferric oxide hydrate
DE2714588C2 (en) * 1977-04-01 1986-06-05 Basf Ag, 6700 Ludwigshafen Process for the production of acicular ferromagnetic iron particles
JPS5853689B2 (en) * 1979-01-20 1983-11-30 戸田工業株式会社 Method for producing acicular crystal metal iron magnetic particle powder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH528320A (en) * 1969-04-17 1972-09-30 Stamicarbon Discs, tapes and magnetic bodies for magnetic recordings
FR2368131A1 (en) * 1976-10-14 1978-05-12 Basf Ag PARTICLES

Also Published As

Publication number Publication date
DE2935358A1 (en) 1981-03-26
US4344791A (en) 1982-08-17
EP0024694A2 (en) 1981-03-11
EP0024694B1 (en) 1983-09-28
DE3065058D1 (en) 1983-11-03
JPS5638405A (en) 1981-04-13

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